Improvement in changing rotary into reciprocating motion



ALEXANDERDEAN, OF PENN YAN, NEVV YORK.

IMPROVEMENT IN CHANGlNG ROTARY INTO RECIPROCATING MOTION.

specification forming' part of Letters Patent NO. l'n'b, dated November 29, 1864 anteda ted November 25, 1864.

To (LZZ whom, it may concern:

Be it known that I, ALEXANDER DEAN, of Penn Yan, in the county of Yates and State of New Yolk, have invented a new and useful Improvement in Machines for Changing,` RO tary into Beciprocating' Motion and I do hereby declare that the following is a full and exaet description thcreof, reference being had to the aecompanying` drawing's, making' part of this specification.

Figure 1 is a front elevation of my improved machine; Fig. 2, a Vertical transverse section of the same in the plane of line w w, Fig'. l, showing1 the drum and Operating` parts in elevation; Fig. 3, a top view of one of the frietion-rollers and the end of the standard in which its rests; Fig. 4, a side view of a portion of the reciprocatimg` gate or slide, showing a modification of the means of adjusting the standards that support the friction-wheels; Fig'. 5, a view of one of the cam-rin gs detaehed.

Like letters of reference indicate corresponding' parts in all the figures.

It is the object of my improvement to convert a rotary into a reeiprocating motion, and to vary or adjust the length of the stroke of the gate or slide that reeeives the latter in order to adapt it to the various purposes to which it is to be applied.

My invention consists in a drum, or equivalent, forming` the double frustum of a eone having eircular rims or heads of different diameters, on which fit cam-rings of varying eceentricity or throw, Operating on a reciprocating gate by means of friction-wheels, whose standards or bearings are adj ustable laterally to correspond with the various positions of the cams.

As represented in the drawings, a suitable frame, A, is provided, having two upright supports or bearings, B B, on opposite sides, in which is mounted a drum, O. This drum is preferably made of iron, cast hollow, and havin g two heads, fitting, respeetively, in the opposite extremities, provided with journals a a and cranks b b on one or both ends. In form this drum constitutes the double frustum of a cone, whose diameter is greatest in the middle. Midway it is formed with a rim, c, that s'erves as a balance-wheel, and from this point the periphery of the drum on either side is formed into a succession of plane rims or heads, d d d, of regularly-decreasing dlameter, similar to a fusee-wheel, the corresponding rims on the opposite sides being1 of the same diameter and being situated at the same distance from the center. On these rims fit, respectively, rings ff, Fig. 5, covering cams g g, and secured in place on the rims in such a manner as to be removable at pleasure.

The cams g g gradually increase in size or eccentricity from the inner one to the outer one, or in the direction opposite to the increase of the diameter of the rims el cl. Thus it will be seen that the inner cam has the minimum and the outer the maximum amount of throw. The cams of similar rings on opposite sides stand in the same relative position, so as to produce the same amount of stroke at the same time.

Beneath the drum is situated a reciprocating gate D, or equivalent, running in grooves or guides h h of the bearings B B. In this gate are made a suitable number of adjusting-holes, z' fi, corresponding' with the cams above, or an equivalent slot, as is shown in Fig. 4, by means of which standards k kare secured in any dcsired position by bolts l Z. These standards support friction-wheels m m in their tops, which frictionwheels receive the action of the cams g g, and thus produee a reciprocating motion of the gate. The reaction of the gate is produced by'spring's n n, or equivalent.

The operation of this machine is manifest. The eccentricity of the cams forces the gate downward and the springs 'n a draw it back, thus producingthe up-and-down motion. This reciprocating motion is particularly applicable to many different purposes where a very great power is notnecessary, especially in farm usesuch, for instance7 as cutting` straw, churning, sawing wood, &c. It is obvious that in apply ing the machine to these various uses it is necessary to vary the length of the stroke of the gate D-for example, in cutting,` straw the strole would be short, but in ehurning it would be long. It will be seen that this effect is aceomplished by merely moving the standards or bearings k k in or out laterally beneath the corresponding` cam s, as indieated by the black and red outlines of the same in Fig. 1, the inner cams producing the shorter and the outer eams the longer strokes. This adaptation of my machine to various len gths of stroke is of great iinportanee.

By this arrangement of the conical drum and the cam-rings fitting thereon, if at any time the cams get out of order, or if it is desirable to change their position, they are easily removed and replaced. This is an advantage over a drum With the cams forming a part of the same or fixed rigidly in place.

I do not claim, broadly, an eccentric acting on a reciprocating slide, as I am aware that such is common in mechansm; but

What I elaim as my invention, and desire to secure by Letters Patent, is-

The drum O, provided with the rims d d d ALEXANDER DEAN.

Wtnesses:

R. F. OsGooD, J. S. TRIPHAGER. 

